As above I have the single version of this fitted on both my basses, I simply filed down the bridge and it slotted in nice and tight. I have a cheap Rocktek 7 band graphic and it goes through a Markbass Mini. I always get a good rich sound and very few feedback problems. These are great pickups for the money, I tried Fishman and Shadow but found these the best for live rock n roll use. If you take your time fitting it as you have done the results are amazing for the price.